/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.gluten.runtime

import org.apache.spark.task.{TaskResource, TaskResources}

object Runtimes {

  /** Get or create the runtime which bound with Spark TaskContext. */
  def contextInstance(backendName: String, name: String): Runtime = {
    if (!TaskResources.inSparkTask()) {
      throw new IllegalStateException("This method must be called in a Spark task.")
    }

    val resourceName = String.format("%s:%s", backendName, name)
    TaskResources.addResourceIfNotRegistered(resourceName, () => create(backendName, name))
  }

  private def create(backendName: String, name: String): Runtime with TaskResource = {
    Runtime(backendName, name)
  }
}
